Pressure switch

Abstract

In a pressure switch with a housing in which a plunger element is located that is movable against a spring force of a first elastic element—contacts being located directly or indirectly on the plunger element, and the first elastic element being located on the side of the plunger element facing toward or away from the media connection—a second elastic element is provided, against the spring force of which the plunger element can be moved. As a result, the pressure switch can be used for pressures>200 bar in situations where overall dimensions are small.

1. A pressure switch, comprising a housing;
 a plunger element located in said housing and providing contacting; a first elastic element providing a spring force against which said plunger element is movable; contacts provided on said plunger element, said first elastic element being located on a side of said plunger element selected from the group consisting of a side facing toward a media connection and a side facing away from the media connection; and a second elastic element providing a spring force against which said plunger element is movable, wherein said plunger element has an end where the media connection is located and includes a shoulder at said end, said second elastic element bearing against said shoulder. 
 
   
   
     2. A pressure switch as defined in  claim 1 , wherein said shoulder of said plunger element has a plate-shaped configuration. 
   
   
     3. A pressure switch as defined in  claim 2 , wherein said plunger element has a shank extending through said second elastic element, said plate-shaped shoulder of said plunger element abutting against said shank of said plunger element. 
   
   
     4. A pressure switch, comprising a housing: a plunger element located in said housing; a first elastic element providing a spring force against which said plunger element is movable; contacts provided on said plunger element, said first elastic element being located on a side of said plunger element selected from the group consisting of a side facing toward a media connection and a side facing away from the media connection; and a second elastic element providing a spring force against which said plunger element is movable, said first and second elastic elements being configured so that said spring forces of said first and second elastic elements, against which said plunger element is movable, are cumulative; and further comprising pressure-compensating means provided on said plunger element for offsetting a pressure between a media line to be connected and a space provided for said second elastic element. 
   
   
     5. A pressure switch as defined in  claim 4 , wherein said pressure-compensation means are configured as openings in pressure-compensation surfaces on a shoulder of said plunger element.